What is causing the dead zone in the Gulf of Mexico?

What is causing the dead zone in the Gulf of Mexico?

The dead zone is caused by nutrient enrichment from the Mississippi River, particularly nitrogen and phosphorous. Nitrogen and phosphorous enter the river through upstream runoff of fertilizers, soil erosion, animal wastes, and sewage.

What might cause each identified condition to fluctuate over the seasons?

3. What might cause each identified condition to fluctuate over the seasons? (2 points) -Factors that affect conditions over the season is Isolation and its intensity. Also, heat loss which is the loss of energy by reflection scattering, evaporation, and radiation. Albedo is also an identified condition.

How does nutrients affect primary productivity?

Direct and indirect ecological impacts of nutrient enrichment include increased primary productivity, increased phytoplankton biomass, reduction in water clarity, increased incidences of low oxygen events (hypoxia and anoxia), and changes in the trophic structure, trophic interactions, and trophodynamics of …

What are the factors affecting primary productivity?

Net primary productivity varies among ecosystems and depends on many factors. These include solar energy input, temperature and moisture levels, carbon dioxide levels, nutrient availability, and community interactions (e.g., grazing by herbivores) 2.

What is primary productivity Why is it so important for life?

In aquatic ecosystems, primary productivity is driven by the availability of nutrients and light and, to a lesser extent, by temperature and other factors. Primary productivity is important because it is the process that forms the foundation of food webs in most ecosystems.

Which area has the highest amount of primary productivity?

The highest net primary productivity in terrestrial environments occurs in swamps and marshes and tropical rainforests; the lowest occurs in deserts.

Where is productivity highest in the ocean?

Higher chlorophyll concentrations and in general higher productivity are observed on the equator, along the coasts (especially eastern margins), and in the high latitude ocean (Figure 4a and b).

What are three ways to measure primary productivity?

1. What are the three ways primary productivity can be measured? Primary productivity can be measured by the rate of carbon dioxide utilization, the rate of formation of organic compounds, or the rte of oxygen production.

What is primary production and examples?

Introduction. The primary production stage of the supply chain encompasses agricultural activities, aquaculture, fisheries and similar processes resulting in raw food materials. Examples of primary production activities are: farming, fishing, livestock rearing and other production methods.

How do you find primary productivity?

Net Primary Productivity (NPP), or the production of plant biomass, is equal to all of the carbon taken up by the vegetation through photosynthesis (called Gross Primary Production or GPP) minus the carbon that is lost to respiration.

What is used to measure productivity?

One of the most widely used measures of productivity is Gross Domestic Product (GDP) per hour worked. This measure captures the use of labour inputs better than just output per employee.

What are the 4 essential components of productivity?

In her book The Productivity Zone, Penny states that the four essential elements of being more productive are purpose, language, focus, and physiology.

Which of the following is a common way productivity is measured?

Output per hour of all persons—labor productivity—is the most commonly used productivity measure. Labor is an easily-identified input to virtually every production process. In the U.S. nonfarm business sector, labor cost represents more than sixty percent of the value of output produced.

What are three reasons for measuring productivity?

Five Reasons Why Measuring Productivity Can Increase Business Results

• Assistance in conducting efficient operations.
• Proper allocation and time management.
• Identification of weak areas.
• Timely feedback and consistent progress.
• Increased number of products and services.

What are four things that can hinder productivity?

11 Surprising Factors that Can Affect Productivity

• Temperature Changes. When people are either too hot or too cold it can make a difference in their work.
• Listening to Music.
• Building Lighting.
• Inadequate Equipment.
• Employee Satisfaction.
• Completing Busywork.
• Regular Exercise.
• Lack of Training.

What are five factors that can hinder business productivity?

5 Critical Factors Affecting Employee Productivity at Work

• 1 — Work Environment. An employee’s work environment influences their mood, drive and overall performance in your organization.
• 2 — Processes. Processes, or their absence, has a huge impact on organizational productivity.
• 3 — Goals.
• Conclusion.

What is the relationship between economic growth and productivity?

Productivity increases have enabled the U.S. business sector to produce nine times more goods and services since 1947 with a relatively small increase in hours worked. With growth in productivity, an economy is able to produce—and consume—increasingly more goods and services for the same amount of work.

What happens when productivity is increased?

Increased productivity means greater output from the same amount of input. Increased gross domestic product (GDP) and overall economic outputs will drive economic growth, improving the economy and the participants within the economy.